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<h2><span class="refentrytitle"><a name="glib-Simple-XML-Subset-Parser.top_of_page"></a>Simple XML Subset Parser</span></h2>
<p>Simple XML Subset Parser — parses a subset of XML</p>
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<div class="refsynopsisdiv">
<a name="glib-Simple-XML-Subset-Parser.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;glib.h&gt;

enum                <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupError" title="enum GMarkupError">GMarkupError</a>;
#define             <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR:CAPS" title="G_MARKUP_ERROR">G_MARKUP_ERROR</a>
enum                <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseFlags" title="enum GMarkupParseFlags">GMarkupParseFlags</a>;
                    <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext">GMarkupParseContext</a>;
struct              <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser">GMarkupParser</a>;
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *             <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-escape-text" title="g_markup_escape_text ()">g_markup_escape_text</a>                (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *text</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gssize" title="gssize"><span class="type">gssize</span></a> length</code></em>);
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *             <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-printf-escaped" title="g_markup_printf_escaped ()">g_markup_printf_escaped</a>             (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
                                                         <em class="parameter"><code>...</code></em>);
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *             <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-vprintf-escaped" title="g_markup_vprintf_escaped ()">g_markup_vprintf_escaped</a>            (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
                                                         <em class="parameter"><code><span class="type">va_list</span> args</code></em>);
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-end-parse" title="g_markup_parse_context_end_parse ()">g_markup_parse_context_end_parse</a>    (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> **error</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-free" title="g_markup_parse_context_free ()">g_markup_parse_context_free</a>         (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-position" title="g_markup_parse_context_get_position ()">g_markup_parse_context_get_position</a> (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gint" title="gint"><span class="type">gint</span></a> *line_number</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gint" title="gint"><span class="type">gint</span></a> *char_number</code></em>);
const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *         <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-element" title="g_markup_parse_context_get_element ()">g_markup_parse_context_get_element</a>
                                                        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);
const <a class="link" href="glib-Singly-Linked-Lists.html#GSList" title="struct GSList"><span class="returnvalue">GSList</span></a> *        <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-element-stack" title="g_markup_parse_context_get_element_stack ()">g_markup_parse_context_get_element_stack</a>
                                                        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);
<a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a>            <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-user-data" title="g_markup_parse_context_get_user_data ()">g_markup_parse_context_get_user_data</a>
                                                        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);
<a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="returnvalue">GMarkupParseContext</span></a> * <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-new" title="g_markup_parse_context_new ()">g_markup_parse_context_new</a>        (<em class="parameter"><code>const <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> *parser</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseFlags" title="enum GMarkupParseFlags"><span class="type">GMarkupParseFlags</span></a> flags</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Datasets.html#GDestroyNotify" title="GDestroyNotify ()"><span class="type">GDestroyNotify</span></a> user_data_dnotify</code></em>);
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-parse" title="g_markup_parse_context_parse ()">g_markup_parse_context_parse</a>        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *text</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gssize" title="gssize"><span class="type">gssize</span></a> text_len</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> **error</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-push" title="g_markup_parse_context_push ()">g_markup_parse_context_push</a>         (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> *parser</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a>            <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-pop" title="g_markup_parse_context_pop ()">g_markup_parse_context_pop</a>          (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);

enum                <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupCollectType" title="enum GMarkupCollectType">GMarkupCollectType</a>;
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-collect-attributes" title="g_markup_collect_attributes ()">g_markup_collect_attributes</a>         (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *element_name</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **attribute_names</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **attribute_values</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> **error</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupCollectType" title="enum GMarkupCollectType"><span class="type">GMarkupCollectType</span></a> first_type</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *first_attr</code></em>,
                                                         <em class="parameter"><code>...</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="glib-Simple-XML-Subset-Parser.description"></a><h2>Description</h2>
<p>
The "GMarkup" parser is intended to parse a simple markup format
that's a subset of XML. This is a small, efficient, easy-to-use
parser. It should not be used if you expect to interoperate with
other applications generating full-scale XML. However, it's very
useful for application data files, config files, etc. where you
know your application will be the only one writing the file.
Full-scale XML parsers should be able to parse the subset used by
GMarkup, so you can easily migrate to full-scale XML at a later
time if the need arises.
</p>
<p>
GMarkup is not guaranteed to signal an error on all invalid XML;
the parser may accept documents that an XML parser would not.
However, XML documents which are not well-formed<sup>[<a name="wellformed" href="#ftn.wellformed" class="footnote">5</a>]</sup>
are not considered valid GMarkup documents.
</p>
<p>
Simplifications to XML include:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">Only UTF-8 encoding is allowed</li>
<li class="listitem">No user-defined entities</li>
<li class="listitem">Processing instructions, comments and the doctype declaration
are "passed through" but are not interpreted in any way</li>
<li class="listitem">No DTD or validation.</li>
</ul></div>
<p>
</p>
<p>
The markup format does support:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">Elements</li>
<li class="listitem">Attributes</li>
<li class="listitem">5 standard entities:
  <code class="literal">&amp;amp; &amp;lt; &amp;gt; &amp;quot; &amp;apos;</code>
</li>
<li class="listitem">Character references</li>
<li class="listitem">Sections marked as CDATA</li>
</ul></div>
<p>
</p>
</div>
<div class="refsect1">
<a name="glib-Simple-XML-Subset-Parser.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GMarkupError"></a><h3>enum GMarkupError</h3>
<pre class="programlisting">typedef enum
{
  G_MARKUP_ERROR_BAD_UTF8,
  G_MARKUP_ERROR_EMPTY,
  G_MARKUP_ERROR_PARSE,
  /* The following are primarily intended for specific GMarkupParser
   * implementations to set.
   */
  G_MARKUP_ERROR_UNKNOWN_ELEMENT,
  G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,
  G_MARKUP_ERROR_INVALID_CONTENT,
  G_MARKUP_ERROR_MISSING_ATTRIBUTE
} GMarkupError;
</pre>
<p>
Error codes returned by markup parsing.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="G-MARKUP-ERROR-BAD-UTF8:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_BAD_UTF8</code></span></p></td>
<td>text being parsed was not valid UTF-8
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-ERROR-EMPTY:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_EMPTY</code></span></p></td>
<td>document contained nothing, or only whitespace
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-ERROR-PARSE:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_PARSE</code></span></p></td>
<td>document was ill-formed
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-ERROR-UNKNOWN-ELEMENT:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_UNKNOWN_ELEMENT</code></span></p></td>
<td>error should be set by <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>
    functions; element wasn't known
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-ERROR-UNKNOWN-ATTRIBUTE:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE</code></span></p></td>
<td>error should be set by <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>
    functions; attribute wasn't known
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-ERROR-INVALID-CONTENT:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_INVALID_CONTENT</code></span></p></td>
<td>error should be set by <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>
    functions; content was invalid
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-ERROR-MISSING-ATTRIBUTE:CAPS"></a><span class="term"><code class="literal">G_MARKUP_ERROR_MISSING_ATTRIBUTE</code></span></p></td>
<td>error should be set by <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>
    functions; a required attribute was missing
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="G-MARKUP-ERROR:CAPS"></a><h3>G_MARKUP_ERROR</h3>
<pre class="programlisting">#define G_MARKUP_ERROR g_markup_error_quark ()
</pre>
<p>
Error domain for markup parsing.
Errors in this domain will be from the <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupError" title="enum GMarkupError"><span class="type">GMarkupError</span></a> enumeration.
See <a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> for information on error domains.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GMarkupParseFlags"></a><h3>enum GMarkupParseFlags</h3>
<pre class="programlisting">typedef enum
{
  G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG = 1 &lt;&lt; 0,
  G_MARKUP_TREAT_CDATA_AS_TEXT              = 1 &lt;&lt; 1,
  G_MARKUP_PREFIX_ERROR_POSITION            = 1 &lt;&lt; 2
} GMarkupParseFlags;
</pre>
<p>
Flags that affect the behaviour of the parser.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="G-MARKUP-DO-NOT-USE-THIS-UNSUPPORTED-FLAG:CAPS"></a><span class="term"><code class="literal">G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG</code></span></p></td>
<td>flag you should not use
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-TREAT-CDATA-AS-TEXT:CAPS"></a><span class="term"><code class="literal">G_MARKUP_TREAT_CDATA_AS_TEXT</code></span></p></td>
<td>When this flag is set, CDATA marked
    sections are not passed literally to the <em class="parameter"><code>passthrough</code></em> function of
    the parser. Instead, the content of the section (without the
    <code class="literal">&lt;![CDATA[</code> and <code class="literal">]]&gt;</code>) is
    passed to the <em class="parameter"><code>text</code></em> function. This flag was added in GLib 2.12
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-PREFIX-ERROR-POSITION:CAPS"></a><span class="term"><code class="literal">G_MARKUP_PREFIX_ERROR_POSITION</code></span></p></td>
<td>Normally errors caught by GMarkup
    itself have line/column information prefixed to them to let the
    caller know the location of the error. When this flag is set the
    location information is also prefixed to errors generated by the
    <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> implementation functions
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GMarkupParseContext"></a><h3>GMarkupParseContext</h3>
<pre class="programlisting">typedef struct _GMarkupParseContext GMarkupParseContext;</pre>
<p>
A parse context is used to parse a stream of bytes that
you expect to contain marked-up text.
</p>
<p>
See <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-new" title="g_markup_parse_context_new ()"><code class="function">g_markup_parse_context_new()</code></a>, <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>, and so
on for more details.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GMarkupParser"></a><h3>struct GMarkupParser</h3>
<pre class="programlisting">struct GMarkupParser {
  /* Called for open tags &lt;foo bar="baz"&gt; */
  void (*start_element)  (GMarkupParseContext *context,
                          const gchar         *element_name,
                          const gchar        **attribute_names,
                          const gchar        **attribute_values,
                          gpointer             user_data,
                          GError             **error);

  /* Called for close tags &lt;/foo&gt; */
  void (*end_element)    (GMarkupParseContext *context,
                          const gchar         *element_name,
                          gpointer             user_data,
                          GError             **error);

  /* Called for character data */
  /* text is not nul-terminated */
  void (*text)           (GMarkupParseContext *context,
                          const gchar         *text,
                          gsize                text_len,
                          gpointer             user_data,
                          GError             **error);

  /* Called for strings that should be re-saved verbatim in this same
   * position, but are not otherwise interpretable.  At the moment
   * this includes comments and processing instructions.
   */
  /* text is not nul-terminated. */
  void (*passthrough)    (GMarkupParseContext *context,
                          const gchar         *passthrough_text,
                          gsize                text_len,
                          gpointer             user_data,
                          GError             **error);

  /* Called on error, including one set by other
   * methods in the vtable. The GError should not be freed.
   */
  void (*error)          (GMarkupParseContext *context,
                          GError              *error,
                          gpointer             user_data);
};
</pre>
<p>
Any of the fields in <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> can be <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>, in which case they
will be ignored. Except for the <em class="parameter"><code>error</code></em> function, any of these callbacks
can set an error; in particular the <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-UNKNOWN-ELEMENT:CAPS"><code class="literal">G_MARKUP_ERROR_UNKNOWN_ELEMENT</code></a>,
<a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-UNKNOWN-ATTRIBUTE:CAPS"><code class="literal">G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE</code></a>, and <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-INVALID-CONTENT:CAPS"><code class="literal">G_MARKUP_ERROR_INVALID_CONTENT</code></a>
errors are intended to be set from these callbacks. If you set an error
from a callback, <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-parse" title="g_markup_parse_context_parse ()"><code class="function">g_markup_parse_context_parse()</code></a> will report that error
back to its caller.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GMarkupParser.start-element"></a>start_element</code></em> ()</span></p></td>
<td>Callback to invoke when the opening tag of an element
is seen.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GMarkupParser.end-element"></a>end_element</code></em> ()</span></p></td>
<td>Callback to invoke when the closing tag of an element
is seen. Note that this is also called for empty tags like
<code class="literal">&lt;empty/&gt;</code>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GMarkupParser.text"></a>text</code></em> ()</span></p></td>
<td>Callback to invoke when some text is seen (text is always
inside an element). Note that the text of an element may be spread
over multiple calls of this function. If the
<a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-TREAT-CDATA-AS-TEXT:CAPS"><code class="literal">G_MARKUP_TREAT_CDATA_AS_TEXT</code></a> flag is set, this function is also
called for the content of CDATA marked sections.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GMarkupParser.passthrough"></a>passthrough</code></em> ()</span></p></td>
<td>Callback to invoke for comments, processing instructions
and doctype declarations; if you're re-writing the parsed document,
write the passthrough text back out in the same position. If the
<a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-TREAT-CDATA-AS-TEXT:CAPS"><code class="literal">G_MARKUP_TREAT_CDATA_AS_TEXT</code></a> flag is not set, this function is also
called for CDATA marked sections.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GMarkupParser.error"></a>error</code></em> ()</span></p></td>
<td>Callback to invoke when an error occurs.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-escape-text"></a><h3>g_markup_escape_text ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *             g_markup_escape_text                (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *text</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gssize" title="gssize"><span class="type">gssize</span></a> length</code></em>);</pre>
<p>
Escapes text so that the markup parser will parse it verbatim.
Less than, greater than, ampersand, etc. are replaced with the
corresponding entities. This function would typically be used
when writing out a file to be parsed with the markup parser.
</p>
<p>
Note that this function doesn't protect whitespace and line endings
from being processed according to the XML rules for normalization
of line endings and attribute values.
</p>
<p>
Note also that this function will produce character references in
the range of &amp;<span class="type">x1</span>; ... &amp;<span class="type">x1f</span>; for all control sequences
except for tabstop, newline and carriage return.  The character
references in this range are not valid XML 1.0, but they are
valid XML 1.1 and will be accepted by the GMarkup parser.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>text</code></em> :</span></p></td>
<td>some valid UTF-8 text</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>length of <em class="parameter"><code>text</code></em> in bytes, or -1 if the text is nul-terminated</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a newly allocated string with the escaped text</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-printf-escaped"></a><h3>g_markup_printf_escaped ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *             g_markup_printf_escaped             (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
                                                         <em class="parameter"><code>...</code></em>);</pre>
<p>
Formats arguments according to <em class="parameter"><code>format</code></em>, escaping
all string and character arguments in the fashion
of <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-escape-text" title="g_markup_escape_text ()"><code class="function">g_markup_escape_text()</code></a>. This is useful when you
want to insert literal strings into XML-style markup
output, without having to worry that the strings
might themselves contain markup.
</p>
<p>
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="keyword">const</span><span class="normal"> </span><span class="type">char</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">store </span><span class="symbol">=</span><span class="normal"> </span><span class="string">"Fortnum &amp; Mason"</span><span class="symbol">;</span>
<span class="keyword">const</span><span class="normal"> </span><span class="type">char</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">item </span><span class="symbol">=</span><span class="normal"> </span><span class="string">"Tea"</span><span class="symbol">;</span>
<span class="type">char</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">output</span><span class="symbol">;</span>
<span class="normal"> </span>
<span class="normal">output </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="glib-Simple-XML-Subset-Parser.html#g-markup-printf-escaped">g_markup_printf_escaped</a></span><span class="normal"> </span><span class="symbol">(</span><span class="string">"&lt;purchase&gt;"</span>
<span class="normal">                                  </span><span class="string">"&lt;store&gt;%s&lt;/store&gt;"</span>
<span class="normal">                                  </span><span class="string">"&lt;item&gt;%s&lt;/item&gt;"</span>
<span class="normal">                                  </span><span class="string">"&lt;/purchase&gt;"</span><span class="symbol">,</span>
<span class="normal">                                  store</span><span class="symbol">,</span><span class="normal"> item</span><span class="symbol">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>printf() style format string</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>the arguments to insert in the format string</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>newly allocated result from formatting
operation. Free with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-vprintf-escaped"></a><h3>g_markup_vprintf_escaped ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *             g_markup_vprintf_escaped            (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
                                                         <em class="parameter"><code><span class="type">va_list</span> args</code></em>);</pre>
<p>
Formats the data in <em class="parameter"><code>args</code></em> according to <em class="parameter"><code>format</code></em>, escaping
all string and character arguments in the fashion
of <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-escape-text" title="g_markup_escape_text ()"><code class="function">g_markup_escape_text()</code></a>. See <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-printf-escaped" title="g_markup_printf_escaped ()"><code class="function">g_markup_printf_escaped()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>printf() style format string</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>args</code></em> :</span></p></td>
<td>variable argument list, similar to <code class="function">vprintf()</code>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>newly allocated result from formatting
operation. Free with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-end-parse"></a><h3>g_markup_parse_context_end_parse ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>            g_markup_parse_context_end_parse    (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>
Signals to the <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> that all data has been
fed into the parse context with <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-parse" title="g_markup_parse_context_parse ()"><code class="function">g_markup_parse_context_parse()</code></a>.
</p>
<p>
This function reports an error if the document isn't complete,
for example if elements are still open.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> on success, <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> if an error was set</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-free"></a><h3>g_markup_parse_context_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                g_markup_parse_context_free         (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);</pre>
<p>
Frees a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>.
</p>
<p>
This function can't be called from inside one of the
<a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> functions or while a subparser is pushed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-get-position"></a><h3>g_markup_parse_context_get_position ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                g_markup_parse_context_get_position (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gint" title="gint"><span class="type">gint</span></a> *line_number</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gint" title="gint"><span class="type">gint</span></a> *char_number</code></em>);</pre>
<p>
Retrieves the current line number and the number of the character on
that line. Intended for use in error messages; there are no strict
semantics for what constitutes the "current" line number other than
"the best number we could come up with for error messages."
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>line_number</code></em> :</span></p></td>
<td>return location for a line number, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>char_number</code></em> :</span></p></td>
<td>return location for a char-on-line number, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-get-element"></a><h3>g_markup_parse_context_get_element ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *         g_markup_parse_context_get_element
                                                        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);</pre>
<p>
Retrieves the name of the currently open element.
</p>
<p>
If called from the start_element or end_element handlers this will
give the element_name as passed to those functions. For the parent
elements, see <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-element-stack" title="g_markup_parse_context_get_element_stack ()"><code class="function">g_markup_parse_context_get_element_stack()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the name of the currently open element, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.2</p>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-get-element-stack"></a><h3>g_markup_parse_context_get_element_stack ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Singly-Linked-Lists.html#GSList" title="struct GSList"><span class="returnvalue">GSList</span></a> *        g_markup_parse_context_get_element_stack
                                                        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);</pre>
<p>
Retrieves the element stack from the internal state of the parser.
</p>
<p>
The returned <a class="link" href="glib-Singly-Linked-Lists.html#GSList" title="struct GSList"><span class="type">GSList</span></a> is a list of strings where the first item is
the currently open tag (as would be returned by
<a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-element" title="g_markup_parse_context_get_element ()"><code class="function">g_markup_parse_context_get_element()</code></a>) and the next item is its
immediate parent.
</p>
<p>
This function is intended to be used in the start_element and
end_element handlers where <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-get-element" title="g_markup_parse_context_get_element ()"><code class="function">g_markup_parse_context_get_element()</code></a>
would merely return the name of the element that is being
processed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the element stack, which must not be modified</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.16</p>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-get-user-data"></a><h3>g_markup_parse_context_get_user_data ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a>            g_markup_parse_context_get_user_data
                                                        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);</pre>
<p>
Returns the user_data associated with <em class="parameter"><code>context</code></em>.
</p>
<p>
This will either be the user_data that was provided to
<a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-new" title="g_markup_parse_context_new ()"><code class="function">g_markup_parse_context_new()</code></a> or to the most recent call
of <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-push" title="g_markup_parse_context_push ()"><code class="function">g_markup_parse_context_push()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the provided user_data. The returned data belongs to
the markup context and will be freed when
<a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-free" title="g_markup_parse_context_free ()"><code class="function">g_markup_parse_context_free()</code></a> is called.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.18</p>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-new"></a><h3>g_markup_parse_context_new ()</h3>
<pre class="programlisting"><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="returnvalue">GMarkupParseContext</span></a> * g_markup_parse_context_new        (<em class="parameter"><code>const <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> *parser</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseFlags" title="enum GMarkupParseFlags"><span class="type">GMarkupParseFlags</span></a> flags</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Datasets.html#GDestroyNotify" title="GDestroyNotify ()"><span class="type">GDestroyNotify</span></a> user_data_dnotify</code></em>);</pre>
<p>
Creates a new parse context. A parse context is used to parse
marked-up documents. You can feed any number of documents into
a context, as long as no errors occur; once an error occurs,
the parse context can't continue to parse text (you have to
free it and create a new parse context).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>parser</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
<td>one or more <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseFlags" title="enum GMarkupParseFlags"><span class="type">GMarkupParseFlags</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data to pass to <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> functions</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data_dnotify</code></em> :</span></p></td>
<td>user data destroy notifier called when
the parse context is freed</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-parse"></a><h3>g_markup_parse_context_parse ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>            g_markup_parse_context_parse        (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *text</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gssize" title="gssize"><span class="type">gssize</span></a> text_len</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>
Feed some data to the <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>.
</p>
<p>
The data need not be valid UTF-8; an error will be signaled if
it's invalid. The data need not be an entire document; you can
feed a document into the parser incrementally, via multiple calls
to this function. Typically, as you receive data from a network
connection or file, you feed each received chunk of data into this
function, aborting the process if an error occurs. Once an error
is reported, no further data may be fed to the <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>;
all errors are fatal.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>text</code></em> :</span></p></td>
<td>chunk of text to parse</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>text_len</code></em> :</span></p></td>
<td>length of <em class="parameter"><code>text</code></em> in bytes</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> if an error occurred, <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> on success</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-push"></a><h3>g_markup_parse_context_push ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                g_markup_parse_context_push         (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> *parser</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
Temporarily redirects markup data to a sub-parser.
</p>
<p>
This function may only be called from the start_element handler of
a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>. It must be matched with a corresponding call to
<a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-pop" title="g_markup_parse_context_pop ()"><code class="function">g_markup_parse_context_pop()</code></a> in the matching end_element handler
(except in the case that the parser aborts due to an error).
</p>
<p>
All tags, text and other data between the matching tags is
redirected to the subparser given by <em class="parameter"><code>parser</code></em>. <em class="parameter"><code>user_data</code></em> is used
as the user_data for that parser. <em class="parameter"><code>user_data</code></em> is also passed to the
error callback in the event that an error occurs. This includes
errors that occur in subparsers of the subparser.
</p>
<p>
The end tag matching the start tag for which this call was made is
handled by the previous parser (which is given its own user_data)
which is why <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-pop" title="g_markup_parse_context_pop ()"><code class="function">g_markup_parse_context_pop()</code></a> is provided to allow "one
last access" to the <em class="parameter"><code>user_data</code></em> provided to this function. In the
case of error, the <em class="parameter"><code>user_data</code></em> provided here is passed directly to
the error callback of the subparser and <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-pop" title="g_markup_parse_context_pop ()"><code class="function">g_markup_parse_context_pop()</code></a>
should not be called. In either case, if <em class="parameter"><code>user_data</code></em> was allocated
then it ought to be freed from both of these locations.
</p>
<p>
This function is not intended to be directly called by users
interested in invoking subparsers. Instead, it is intended to be
used by the subparsers themselves to implement a higher-level
interface.
</p>
<p>
As an example, see the following implementation of a simple
parser that counts the number of tags encountered.
</p>
<p>
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
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        <td class="listing_code"><pre class="programlisting"><span class="keyword">typedef</span><span class="normal"> </span><span class="keyword">struct</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">gint</span><span class="normal"> tag_count</span><span class="symbol">;</span>
<span class="cbracket">}</span><span class="normal"> CounterData</span><span class="symbol">;</span>

<span class="keyword">static</span><span class="normal"> </span><span class="type">void</span>
<span class="function">counter_start_element</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GMarkupParseContext</span><span class="normal">  </span><span class="symbol">*</span><span class="normal">context</span><span class="symbol">,</span>
<span class="normal">                       </span><span class="keyword">const</span><span class="normal"> </span><span class="usertype">gchar</span><span class="normal">          </span><span class="symbol">*</span><span class="normal">element_name</span><span class="symbol">,</span>
<span class="normal">                       </span><span class="keyword">const</span><span class="normal"> </span><span class="usertype">gchar</span><span class="normal">         </span><span class="symbol">**</span><span class="normal">attribute_names</span><span class="symbol">,</span>
<span class="normal">                       </span><span class="keyword">const</span><span class="normal"> </span><span class="usertype">gchar</span><span class="normal">         </span><span class="symbol">**</span><span class="normal">attribute_values</span><span class="symbol">,</span>
<span class="normal">                       </span><span class="usertype">gpointer</span><span class="normal">              user_data</span><span class="symbol">,</span>
<span class="normal">                       </span><span class="usertype">GError</span><span class="normal">              </span><span class="symbol">**</span><span class="normal">error</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">CounterData</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">data </span><span class="symbol">=</span><span class="normal"> user_data</span><span class="symbol">;</span>

<span class="normal">  data</span><span class="symbol">-&gt;</span><span class="normal">tag_count</span><span class="symbol">++;</span>
<span class="cbracket">}</span>

<span class="keyword">static</span><span class="normal"> </span><span class="type">void</span>
<span class="function">counter_error</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GMarkupParseContext</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">context</span><span class="symbol">,</span>
<span class="normal">               </span><span class="usertype">GError</span><span class="normal">              </span><span class="symbol">*</span><span class="normal">error</span><span class="symbol">,</span>
<span class="normal">               </span><span class="usertype">gpointer</span><span class="normal">             user_data</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">CounterData</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">data </span><span class="symbol">=</span><span class="normal"> user_data</span><span class="symbol">;</span>

<span class="normal">  </span><span class="function"><a href="glib-Memory-Slices.html#g-slice-free">g_slice_free</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">CounterData</span><span class="symbol">,</span><span class="normal"> data</span><span class="symbol">);</span>
<span class="cbracket">}</span>

<span class="keyword">static</span><span class="normal"> </span><span class="usertype">GMarkupParser</span><span class="normal"> counter_subparser </span><span class="symbol">=</span>
<span class="cbracket">{</span>
<span class="normal">  counter_start_element</span><span class="symbol">,</span>
<span class="normal">  <a href="glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span>
<span class="normal">  <a href="glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span>
<span class="normal">  <a href="glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span>
<span class="normal">  counter_error</span>
<span class="cbracket">}</span><span class="symbol">;</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<p>
In order to allow this parser to be easily used as a subparser, the
following interface is provided:
</p>
<p>
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
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20</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="type">void</span>
<span class="function">start_counting</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GMarkupParseContext</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">context</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">CounterData</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">data </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="glib-Memory-Slices.html#g-slice-new">g_slice_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">CounterData</span><span class="symbol">);</span>

<span class="normal">  data</span><span class="symbol">-&gt;</span><span class="normal">tag_count </span><span class="symbol">=</span><span class="normal"> </span><span class="number">0</span><span class="symbol">;</span>
<span class="normal">  </span><span class="function"><a href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-push">g_markup_parse_context_push</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">&amp;</span><span class="normal">counter_subparser</span><span class="symbol">,</span><span class="normal"> data</span><span class="symbol">);</span>
<span class="cbracket">}</span>

<span class="normal"><a href="glib-Basic-Types.html#gint">gint</a></span>
<span class="function">end_counting</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GMarkupParseContext</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">context</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">CounterData</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">data </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-pop">g_markup_parse_context_pop</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">);</span>
<span class="normal">  </span><span class="type">int</span><span class="normal"> result</span><span class="symbol">;</span>

<span class="normal">  result </span><span class="symbol">=</span><span class="normal"> data</span><span class="symbol">-&gt;</span><span class="normal">tag_count</span><span class="symbol">;</span>
<span class="normal">  </span><span class="function"><a href="glib-Memory-Slices.html#g-slice-free">g_slice_free</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">CounterData</span><span class="symbol">,</span><span class="normal"> data</span><span class="symbol">);</span>

<span class="normal">  </span><span class="keyword">return</span><span class="normal"> result</span><span class="symbol">;</span>
<span class="cbracket">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<p>
The subparser would then be used as follows:
</p>
<p>
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
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15</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="keyword">static</span><span class="normal"> </span><span class="type">void</span><span class="normal"> </span><span class="function">start_element</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">,</span><span class="normal"> element_name</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">...)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="function">strcmp</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">element_name</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"count-these"</span><span class="symbol">)</span><span class="normal"> </span><span class="symbol">==</span><span class="normal"> </span><span class="number">0</span><span class="symbol">)</span>
<span class="normal">    </span><span class="function">start_counting</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">);</span>

<span class="normal">  </span><span class="comment">/* else, handle other tags... */</span>
<span class="cbracket">}</span>

<span class="keyword">static</span><span class="normal"> </span><span class="type">void</span><span class="normal"> </span><span class="function">end_element</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">,</span><span class="normal"> element_name</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">...)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="function">strcmp</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">element_name</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"count-these"</span><span class="symbol">)</span><span class="normal"> </span><span class="symbol">==</span><span class="normal"> </span><span class="number">0</span><span class="symbol">)</span>
<span class="normal">    </span><span class="function"><a href="glib-Warnings-and-Assertions.html#g-print">g_print</a></span><span class="normal"> </span><span class="symbol">(</span><span class="string">"Counted %d tags</span><span class="specialchar">\n</span><span class="string">"</span><span class="symbol">,</span><span class="normal"> </span><span class="function">end_counting</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">));</span>

<span class="normal">  </span><span class="comment">/* else, handle other tags... */</span>
<span class="cbracket">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parser</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data to pass to <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> functions</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.18</p>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-parse-context-pop"></a><h3>g_markup_parse_context_pop ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a>            g_markup_parse_context_pop          (<em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a> *context</code></em>);</pre>
<p>
Completes the process of a temporary sub-parser redirection.
</p>
<p>
This function exists to collect the user_data allocated by a
matching call to <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-push" title="g_markup_parse_context_push ()"><code class="function">g_markup_parse_context_push()</code></a>. It must be called
in the end_element handler corresponding to the start_element
handler during which <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-push" title="g_markup_parse_context_push ()"><code class="function">g_markup_parse_context_push()</code></a> was called.
You must not call this function from the error callback -- the
<em class="parameter"><code>user_data</code></em> is provided directly to the callback in that case.
</p>
<p>
This function is not intended to be directly called by users
interested in invoking subparsers. Instead, it is intended to
be used by the subparsers themselves to implement a higher-level
interface.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParseContext" title="GMarkupParseContext"><span class="type">GMarkupParseContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the user data passed to <a class="link" href="glib-Simple-XML-Subset-Parser.html#g-markup-parse-context-push" title="g_markup_parse_context_push ()"><code class="function">g_markup_parse_context_push()</code></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.18</p>
</div>
<hr>
<div class="refsect2">
<a name="GMarkupCollectType"></a><h3>enum GMarkupCollectType</h3>
<pre class="programlisting">typedef enum
{
  G_MARKUP_COLLECT_INVALID,
  G_MARKUP_COLLECT_STRING,
  G_MARKUP_COLLECT_STRDUP,
  G_MARKUP_COLLECT_BOOLEAN,
  G_MARKUP_COLLECT_TRISTATE,

  G_MARKUP_COLLECT_OPTIONAL = (1 &lt;&lt; 16)
} GMarkupCollectType;
</pre>
<p>
A mixed enumerated type and flags field. You must specify one type
(string, strdup, boolean, tristate).  Additionally, you may  optionally
bitwise OR the type with the flag <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-COLLECT-OPTIONAL:CAPS"><code class="literal">G_MARKUP_COLLECT_OPTIONAL</code></a>.
</p>
<p>
It is likely that this enum will be extended in the future to
support other types.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="G-MARKUP-COLLECT-INVALID:CAPS"></a><span class="term"><code class="literal">G_MARKUP_COLLECT_INVALID</code></span></p></td>
<td>used to terminate the list of attributes
    to collect
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-COLLECT-STRING:CAPS"></a><span class="term"><code class="literal">G_MARKUP_COLLECT_STRING</code></span></p></td>
<td>collect the string pointer directly from
    the attribute_values[] array. Expects a parameter of type (const
    char **). If <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-COLLECT-OPTIONAL:CAPS"><code class="literal">G_MARKUP_COLLECT_OPTIONAL</code></a> is specified and the
    attribute isn't present then the pointer will be set to <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-COLLECT-STRDUP:CAPS"></a><span class="term"><code class="literal">G_MARKUP_COLLECT_STRDUP</code></span></p></td>
<td>as with <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-COLLECT-STRING:CAPS"><code class="literal">G_MARKUP_COLLECT_STRING</code></a>, but
    expects a parameter of type (char **) and <a class="link" href="glib-String-Utility-Functions.html#g-strdup" title="g_strdup ()"><code class="function">g_strdup()</code></a>s the
    returned pointer. The pointer must be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-COLLECT-BOOLEAN:CAPS"></a><span class="term"><code class="literal">G_MARKUP_COLLECT_BOOLEAN</code></span></p></td>
<td>expects a parameter of type (gboolean *)
    and parses the attribute value as a boolean. Sets <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> if the
    attribute isn't present. Valid boolean values consist of
    (case-insensitive) "false", "f", "no", "n", "0" and "true", "t",
    "yes", "y", "1"
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-COLLECT-TRISTATE:CAPS"></a><span class="term"><code class="literal">G_MARKUP_COLLECT_TRISTATE</code></span></p></td>
<td>as with <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-COLLECT-BOOLEAN:CAPS"><code class="literal">G_MARKUP_COLLECT_BOOLEAN</code></a>, but
    in the case of a missing attribute a value is set that compares
    equal to neither <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> nor <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> G_MARKUP_COLLECT_OPTIONAL is
    implied
</td>
</tr>
<tr>
<td><p><a name="G-MARKUP-COLLECT-OPTIONAL:CAPS"></a><span class="term"><code class="literal">G_MARKUP_COLLECT_OPTIONAL</code></span></p></td>
<td>can be bitwise ORed with the other fields.
    If present, allows the attribute not to appear. A default value
    is set depending on what value type is used
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g-markup-collect-attributes"></a><h3>g_markup_collect_attributes ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>            g_markup_collect_attributes         (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *element_name</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **attribute_names</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **attribute_values</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> **error</code></em>,
                                                         <em class="parameter"><code><a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupCollectType" title="enum GMarkupCollectType"><span class="type">GMarkupCollectType</span></a> first_type</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *first_attr</code></em>,
                                                         <em class="parameter"><code>...</code></em>);</pre>
<p>
Collects the attributes of the element from the data passed to the
<a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupParser" title="struct GMarkupParser"><span class="type">GMarkupParser</span></a> start_element function, dealing with common error
conditions and supporting boolean values.
</p>
<p>
This utility function is not required to write a parser but can save
a lot of typing.
</p>
<p>
The <em class="parameter"><code>element_name</code></em>, <em class="parameter"><code>attribute_names</code></em>, <em class="parameter"><code>attribute_values</code></em> and <em class="parameter"><code>error</code></em>
parameters passed to the start_element callback should be passed
unmodified to this function.
</p>
<p>
Following these arguments is a list of "supported" attributes to collect.
It is an error to specify multiple attributes with the same name. If any
attribute not in the list appears in the <em class="parameter"><code>attribute_names</code></em> array then an
unknown attribute error will result.
</p>
<p>
The <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupCollectType" title="enum GMarkupCollectType"><span class="type">GMarkupCollectType</span></a> field allows specifying the type of collection
to perform and if a given attribute must appear or is optional.
</p>
<p>
The attribute name is simply the name of the attribute to collect.
</p>
<p>
The pointer should be of the appropriate type (see the descriptions
under <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupCollectType" title="enum GMarkupCollectType"><span class="type">GMarkupCollectType</span></a>) and may be <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> in case a particular
attribute is to be allowed but ignored.
</p>
<p>
This function deals with issuing errors for missing attributes
(of type <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-MISSING-ATTRIBUTE:CAPS"><code class="literal">G_MARKUP_ERROR_MISSING_ATTRIBUTE</code></a>), unknown attributes
(of type <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-UNKNOWN-ATTRIBUTE:CAPS"><code class="literal">G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE</code></a>) and duplicate
attributes (of type <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-INVALID-CONTENT:CAPS"><code class="literal">G_MARKUP_ERROR_INVALID_CONTENT</code></a>) as well
as parse errors for boolean-valued attributes (again of type
<a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-ERROR-INVALID-CONTENT:CAPS"><code class="literal">G_MARKUP_ERROR_INVALID_CONTENT</code></a>). In all of these cases <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>
will be returned and <em class="parameter"><code>error</code></em> will be set as appropriate.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>element_name</code></em> :</span></p></td>
<td>the current tag name</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>attribute_names</code></em> :</span></p></td>
<td>the attribute names</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>attribute_values</code></em> :</span></p></td>
<td>the attribute values</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>a pointer to a <a class="link" href="glib-Error-Reporting.html#GError" title="struct GError"><span class="type">GError</span></a> or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_type</code></em> :</span></p></td>
<td>the <a class="link" href="glib-Simple-XML-Subset-Parser.html#GMarkupCollectType" title="enum GMarkupCollectType"><span class="type">GMarkupCollectType</span></a> of the first attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_attr</code></em> :</span></p></td>
<td>the name of the first attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>a pointer to the storage location of the first attribute
(or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>), followed by more types names and pointers, ending
with <a class="link" href="glib-Simple-XML-Subset-Parser.html#G-MARKUP-COLLECT-INVALID:CAPS"><code class="literal">G_MARKUP_COLLECT_INVALID</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if successful</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.16</p>
</div>
</div>
<div class="refsect1">
<a name="glib-Simple-XML-Subset-Parser.see-also"></a><h2>See Also</h2>
<a class="ulink" href="http://www.w3.org/TR/REC-xml/" target="_top">XML
    Specification</a>
</div>
<div class="footnotes">
<br><hr width="100" align="left">
<div class="footnote"><a class="ulink" href="http://www.w3.org/TR/REC-xml/" target="_top"><sup>[<a name="ftn.wellformed" href="#wellformed" class="ulink">5</a>] </sup>XML
specification</a></div>
</div>
</div>
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